算法训练 薪水计算

import java.util.Scanner;
public class Main {

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        double m=sc.nextDouble();
        if(n<=40)
            System.out.printf("%.2f",(n*m));
        else if(n<=50)
            System.out.printf("%.2f",(n-40)*1.5*m+40*m);
        else
            System.out.printf("%.2f",40*m+15*m+(n-50)*2*m);

    }

}